CN202923606U - Wiper system for vehicle and crank connecting rod mechanism thereof - Google Patents
Wiper system for vehicle and crank connecting rod mechanism thereof Download PDFInfo
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- CN202923606U CN202923606U CN 201220654861 CN201220654861U CN202923606U CN 202923606 U CN202923606 U CN 202923606U CN 201220654861 CN201220654861 CN 201220654861 CN 201220654861 U CN201220654861 U CN 201220654861U CN 202923606 U CN202923606 U CN 202923606U
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- sliding component
- piston
- wiper system
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Abstract
The utility model provides a crank connecting rod mechanism for a wiper system. The crank connecting rod mechanism comprises a crank, a connecting rod, a joint assembly and a sliding component, wherein the crank is used for connecting an output shaft of a drive assembly of the wiper system and outputting the rotating movement of the output shaft, and the connecting rod is used for connecting a wiping arm of the wiper system and driving the wiping arm to make reciprocating oscillating movement; the joint assembly is connected with the crank and the connecting rod and comprises a ball pin connected with the connecting rod, and the ball pin is connected to the sliding component; and the sliding component and the output shaft are respectively connected to the two opposite end parts of the crank. When the force transferred to the sliding component by the connecting rod and the ball pin in the crank length direction is larger than a certain critical value, the sliding component and the connecting rod connected with the sliding component slide along the length direction of the crank relative to the crank. The utility model also relates to a wiper system of the crank connecting rod mechanism.
Description
Technical field
The application relates to the vehicle windscreen wiper system that snow load protection (SLP) can be provided, and is specifically related to the piston crank mechanism of this wiper system.
Background technology
The wiper system of vehicle needs to remove the various dirts that drop on Windshield, for example fallen leaves, rainwater, dust or at accumulated snow.Particularly at heavy snow weather, the thick and heavy accumulated snow in the windscreen wiper zone on Windshield can make all parts and the connection between parts in the wiper system bear very large load.
The wiper system comprises the piston crank mechanism that the joint assembly by crank, connecting rod and connecting crank and connecting rod consists of, and piston crank mechanism is used for the oscillating traverse motion that rotational motion with the output shaft of the driven unit of wiper system is converted to the wiper arm of wiper system.If the accumulated snow on Windshield is very thick, accumulated snow reacts in the wiper system, all parts and the connection between parts of wiper system must be born very large force and moment, this can cause the operation of wiper system to stop, the hunting motion of wiper arm is blocked and can not continue motion, also can cause the intrasystem plastic components flexural deformation of wiper or fracture even.
The measure that has existed some to address the above problem in prior art, for example Fig. 1 a and 1b show two examples wherein.The piston crank mechanism complex structure of wiper system in diagram, part is numerous, comprises two dozens of parts such as crank, spring, connecting pin and ball cover.
Fig. 1 c shows the concentric pair of ball and socket that uses in the wiper system of prior art.
The utility model content
The application's purpose is to simplify the wiper system, and makes the wiper system of acquisition possess the snow load defencive function, is specially the piston crank mechanism of simplifying the wiper system, the purpose of the pivot angle by reducing the effective radius of crank, reach to reduce wiper arm.
According to the application's first aspect, a kind of piston crank mechanism for the wiper system is provided, comprise crank, be used for being connected and exporting rotatablely moving of described output shaft with the output shaft of the driven unit of wiper system; Connecting rod, for the wiper arm that connects the wiper system, and the driving wiper arm is done oscillating traverse motion; And the joint assembly of connecting crank and connecting rod, described joint assembly comprises: the ball pin that is connected with connecting rod; And sliding component, described ball pin is connected to described sliding component, described sliding component and described output shaft are connected to respectively two opposite ends of described crank, when be passed to via connecting rod and ball pin on sliding component along the power of crank length direction during greater than a certain critical value, described sliding component and coupled connecting rod slide with respect to crank along the length direction of crank together.
According to a preferred embodiment, described crank is formed the slit that extends along the length direction of crank, and it is interior and removable with respect to described crank in described slit that described sliding component is installed to described slit.
According to a preferred embodiment, length direction along crank, be provided with elastic component between described crank and described sliding component, when be passed to via connecting rod and ball pin on sliding component along the power of crank length direction during greater than the intrinsic elastic force of described elastic component, described elastic component is compressed, thereby described sliding component and coupled connecting rod slide with respect to crank along the length direction of crank together.
According to a preferred embodiment, described elastic component comprises one or more springs.
According to a preferred embodiment, described sliding component is formed the hole of extending along the central axial direction of ball pin, the ball head of described ball pin is fixed in described hole, and wherein, the bearing of trend of the central axis of described ball pin is perpendicular to the length direction of described crank.
According to a preferred embodiment, described sliding component is formed with described ball pin.
According to a preferred embodiment, the slit of described crank is opposite with the end that connects output shaft open-ended on the length direction of crank, by along the first and second edges of crank length direction and vertically connect the 3rd edge limited of described the first and second edges, and described piston crank mechanism also comprises for the stop part that described sliding component is closed in described slit.
According to a preferred embodiment, the slit of described crank is formed in described crank with being closed, and by along the first and second edges of crank length direction and vertically connect the third and fourth edge limited of described the first and second edges, wherein, the end that is connected with the output shaft of wiper system of the more close described crank in more described the 4th edge, described the 3rd edge.
According to a preferred embodiment, described sliding component becomes I-shape, described sliding component is parallel to the first and second opposite side surfaces of crank length direction when comprising on being installed to crank, be formed respectively the first and second notches on described the first and second side surfaces, described the first and second notches are configured side and become to admit respectively described the first and second edges when sliding component is installed in the slit of described crank.
According to a preferred embodiment, described piston crank mechanism also comprises protrusion, described protrusion respectively from the inner peripheral surface at the first and second edges with the projection symmetrically in the described slit of vertical mode, described protrusion does not cover respective edges along the whole length of crank length direction and apart from inner peripheral surface first distance at described the 3rd edge, the thickness of described protrusion is less than the thickness of described crank, and is positioned in residence on thickness direction on the thickness of described crank.
According to a preferred embodiment, described sliding component is parallel to the end surfaces of the central axial direction of described ball pin when comprising on being installed to crank, is formed with the 3rd notch on described end surfaces.
According to the application on the other hand, provide a kind of wiper system, comprised driven unit, it provides power for the wiper system, and comprises the output shaft that output rotatablely moves; Arbitrary described piston crank mechanism according to claim 1-11, the crank of described piston crank mechanism is connected with described output shaft; And wiper arm, it is connected with the connecting rod of described piston crank mechanism, and rotatablely moving of the output shaft of described driven unit is transformed into the oscillating traverse motion of the wiper arm of wiper arm assembly via piston crank mechanism.
Comprise slip ball cover and elastic component according to the application's piston crank mechanism, the accumulated snow resistance that is subject to when the connecting rod of wiper system is during greater than predetermined spring force, the slip ball cover will overcome spring force and slide, and the effective radius of crank is shortened, thereby reduce the windscreen wiper angle of wiper system.Like this, the action of the swing windscreen wiper of the wiper arm of wiper system can not be stopped, thereby has realized the snow load defencive function of wiper system.
Unique design according to the application's wiper system by slip ball cover member has solved the problems referred to above, makes its piston crank mechanism number of parts few, and design of part is simple, be easy to make, easily assemble, correspondingly reduced the cost of wiper system, improve the market competitiveness.
Description of drawings
Can understand better the application's above-mentioned and further feature and advantage from the application's of describing below in conjunction with accompanying drawing preferred embodiment, wherein:
Fig. 1 is the schematic diagram of the wiper system of prior art;
Fig. 1 a and 1b are the example view of crank of the wiper system of prior art;
Fig. 1 c is the schematic diagram of concentric pair of ball and socket using in the wiper system of prior art;
Fig. 2 is the stress curve according to windscreen wiper connecting rod in the cycle of the wiper arm of the application's wiper system;
Fig. 3 has illustrated according to the action principle of the piston crank mechanism of the application's wiper system;
Fig. 4 a-4b shows respectively according to the front elevation of the application's piston crank mechanism and birds-eye view;
Fig. 5 shows the decomposition explosion figure according to the application's piston crank mechanism;
Fig. 6 a-6b shows respectively exploded drawings and the assembly drowing according to the piston crank mechanism of the application the first embodiment;
Fig. 7 a-7b shows respectively exploded drawings and the assembly drowing according to the piston crank mechanism of the application the second embodiment;
Fig. 8 a-8b shows respectively exploded drawings and the assembly drowing according to the piston crank mechanism of the application the 3rd embodiment;
Fig. 9 a-9d shows the different examples according to the slip ball cover of the application's piston crank mechanism;
Figure 10 a-10b shows respectively exploded drawings and the assembly drowing according to the piston crank mechanism of the application the 4th embodiment;
Figure 11 a-11d shows the different examples according to the slip ball cover of the application's piston crank mechanism;
Figure 12 shows the birds-eye view according to the piston crank mechanism of the application the 5th embodiment;
Figure 13 a-13h shows respectively the cross-sectional view according to the piston crank mechanism of the different embodiment of the application;
Figure 14 a-14b is the schematic diagram according to the different arrangements of the spring of the application's piston crank mechanism; And
Figure 15 a-15b shows respectively front elevation and the birds-eye view according to the piston crank mechanism of the application the 6th embodiment.
The specific embodiment
By different embodiment, wiper system according to the application is described below with reference to accompanying drawing.
Show the schematic diagram of wiper system 1 as Fig. 1.Wiper system 1 comprises driven unit 2, piston crank mechanism 3 and is positioned at driver's side and two wiper arm assemblies 4 of the passenger side side.Driven unit 2 is used to wiper system 1 that power is provided, and comprises the motor and speed reducer structure, the output shaft output rotational motion of speed reduction gearing; Piston crank mechanism 3 comprises the crank that is connected with the output shaft of driven unit 2, and the connecting rod that is connected with wiper arm assembly 4, and the joint assembly of connecting crank and connecting rod are used for above-mentioned rotational motion is changed into the oscillating traverse motion of the wiper arm of wiper arm assembly; The wiper arm assembly is included in the wiper arm of reciprocally swinging on vehicle windscreen.
The joint assembly that comprises crank, connecting rod and connecting crank and connecting rod according to the piston crank mechanism 3 of the application's wiper system 1.Fig. 3 shows the schematic diagram of the piston crank mechanism of simplification, and wherein, reference marker 31 represents the wiper arm of wiper system, and 50 represent the crank of wiper system, and 20 represent connecting rod.Be provided with spring 60 between crank and connecting rod, an end of spring 60 is fixed to crank, and the other end is fixed to the slip ball cover that is connected with connecting rod.
Fig. 4 a and 4b show the assembly drowing according to the part of the application's piston crank mechanism 3, and Fig. 5 shows the decomposition explosion figure according to the application's piston crank mechanism 3.The connecting rod 20 of piston crank mechanism 3 is rigidly connected with an end of ball pin 30, in the ball head of ball pin 30 other ends is received in the slit 55 of crank 50 and slidably slides the hole of ball cover 10 along the length direction of crank 50, consist of the point of connection of connecting rod 20 and crank 50.
The concrete structure of piston crank mechanism 3 can be incomplete same, but their action principle is identical.When the wiper arm of wiper system 1 swung on Windshield, the thick and heavy accumulated snow that gathers applied large drag forces to wiper arm, the connecting rod 20 that is connected with wiper arm.During the power F(Fig. 3 along the length direction of crank 50 on acting on connecting rod 20) greater than the built-in spring power of the spring 34 of crank connecting 3, slip ball cover 10, ball pin 30 and the connecting rod 20 that is connected overcome spring force compression spring 60, connecting rod 20 moves near the point of connection of crank 50 with the output shaft (not shown) with the point of connection of crank 50, thereby the effective radius of crank 50 dwindles, and correspondingly reduces the windscreen wiper angle of wiper arm.So effectively avoided wiper arm due to the existence of a large amount of accumulated snow action that stops swinging.
Fig. 2 shows the stress curve of connecting rod 20 in the oscillation period of wiper arm of wiper system 1.Wherein, the crank 50 of wiper system 1 rotates weeks (360 °), and wiper arm is completed a windscreen wiper cycle, comprise scrape action and under scrape action.Wherein vertical dotted line LD1 and LD2 represent the wiper system wiper arm on scrape action and under scrape the desirable final position of action.The shadow region be illustrated in scrape action and under scrape connecting rod in action stressed maxim zone, wiper arm is blocked and stop swinging when oscillating wiper arm is in this pivot angle zone.Vertical solid line LS1 and LS2 represent the final position according to the wiper arm of the application's wiper system, this final position represent according to the application's wiper system the resistance that connecting rod is subject to arrive may cause critical value that wiper arm stops swinging before crank length be decreased to r by R, therefore, the windscreen wiper angle no longer increases, namely stop at the final position place of this LS1 and LS2, scrape on wiper arm action and under scrape in the pivot angle coverage diagram of action section with " * " expression.Thereby avoided the action of wiper in the section of " * * " expression in the drawings system 1 to be stopped.
Specifically describe piston crank mechanism according to the application's wiper system below with reference to accompanying drawing.Hereinafter, the extension of spring (stretching) direction is defined as vertical L, and the side that the slip ball cover is installed on crank is called as the right side, and an opposite side is called as the left side.The thickness direction of crank, namely the bearing of trend of the central axis of ball pin is defined as horizontal T, " making progress " refer to along horizontal T from crank towards connecting rod be on the contrary " downwards ".With vertical and horizontal all vertical direction be defined as side direction A.Certainly, according to the actual installation direction of piston crank mechanism, above-mentioned direction may be different.
Fig. 6 a and 6b show the first embodiment according to the application, and wherein sliding ball is applied mechanically 100 expressions.
Crank 50 is included in upper opposite upper surface 52 and the lower surface 54 of horizontal T, opposite right-hand member surface 56 and left end surface 58 on vertical L, opposite both side surface 62 and 64 on side direction A.
Crank 50 is formed with slit 55 at the end near right-hand member surface 56, is formed with the hole 11 that is connected for the output shaft of the driven unit of wiper system in the side near left end surface 58.Slit 55 penetrates the thickness of crank 50 and is vertically extending on L along horizontal T, and limits by edge 15,25,35 and 45.
The size of slip ball cover 100 is configured to distance W 11 between side surface 112 and 114 greater than the width W 0 of slit 55, and the distance W between notch 122 and 124 12 is substantially equal to width W 0. Notch 122 and 124 depth H 1 are substantially equal to the thickness H0 of crank 50.
when slip ball cover 100 is installed on crank 50, as shown in Fig. 6 a, 1) slip ball cover 100 upwards is installed in the slit 55 of crank 50 along arrow D from lower surface 54, the upper surface 102 of slip ball cover 100 up, lower surface 104 down, 2) make slip ball cover 100 at 90 ° of the rotation with in surfaces that is consisted of by vertical L and side direction A (arrow R), make slip ball cover 100 side 108 then towards the right-hand member surface 56, side surface 112 and 114 is respectively near side surface 62 and 63, thereby notch 122 and 124 is engaged on the edge 35 and 45 that limits slit 55, slip ball cover 100 and crank 50 are locked together along side direction A and horizontal T, as shown in Fig. 6 b, 3) mounting spring 60, in the embodiment of Fig. 6 b, a spring 60 only is provided, alternatively, select type and the spring force of size to obtain to expect of spring according to actual conditions, here, can use two or more springs.
According to the piston crank mechanism of the wiper system of the present embodiment, by a slidably member is set, slip ball cover 100 has reached the technical purpose at the windscreen wiper angle that reduces the wiper system at the accumulated snow resistance during greater than a certain predetermined value.So the piston crank mechanism number of parts is few, design of part is simple, is easy to make and assembling.
Also show the hole 90 that is formed on slip ball cover 100 in figure, be used for the ball head of the ball pin 30 of admittance connecting crank 50 and connecting rod 20.
Fig. 7 a and 7b show the part according to the piston crank mechanism of the second embodiment of the application, and the Reference numeral of each element obtains for the Reference numeral according to the respective element of the first embodiment has increased by 200.
The slit 255 of crank 250 from right lateral surface 256 in left-hand face 258 vertically extends to crank 250, so slit 255 elongation and in right-end openings on vertical L roughly is the T shape.Slit 255 limits by edge 225,235 and 245.
Different from the first embodiment is that this second embodiment comprises fixedly end cap 280 in addition, is used for slip ball cover 200 is fixedly attached to crank 250.
when slip ball cover 200 is installed on crank 250, 1) in as shown in Figure 7a mode, slip ball cover 200 is inserted in slit 255 from the right-end openings of slit 255, the upper surface 202 of slip ball cover 200 up, lower surface 204 down, the side surface 208 of slip ball cover 200 is towards the right-hand member surface 256, side surface 212 is near side surface 262, the notch 222 and 224 of slip ball cover 200 is engaged on the edge 235 and 245 that limits slit 255, slip ball cover 200 and crank 250 are locked together along side direction A and horizontal T, 2) as shown in Figure 7b, fixedly end cap 280 is installed, fixedly end cap 280 can be fixed on the right lateral surface 256 of crank 250 by any known mode, such as the bolt (not shown) by passing the fixing hole 282 of end cap 280 or by riveted joint etc., 3) mounting spring 260 between the side surface 206 of edge 225 and slip ball cover 200, in like manner, also can use one according to actual conditions, two or more springs.
The advantage of this second embodiment be the to slide scantling of structure of ball cover 200 is not subjected to the restriction of crank 250 slits 255.
Fig. 8 a and 8b show the part according to the piston crank mechanism of the application's the 3rd embodiment, and the Reference numeral of its each element obtains for the Reference numeral according to the respective element of the first embodiment has increased by 300.
In this 3rd embodiment, the slit 355 of crank 350 roughly becomes T shape, comprises near the narrower part 316 of the right lateral surface 356 of crank 350 with near the wider portion 317 of left-hand face 358.Narrower part 316 has width W 10, and wider portion 317 has the width W 20 greater than width W 10.
Slip ball cover 300 comprises when slip ball cover 300 is installed on crank 350 respectively near the side surface 306 of right lateral surface 356 and opposite side surface 308.Slip ball cover 300 comprises notch 322 and 324 at another to opposite side.
Be with slip ball cover 100 differences, be provided with the excision section on the upper wall 372 and 374 that limits notch 322 and notch 324, make the residue section 342 and 344 of upper wall 372 and 374 along side direction A alignment, and length L 3 is approximately equal to or less than the length L 30 of wider portion 317.Alternatively, along the residue section 342 of side direction A alignment and 344 can more close slip ball cover 300 side surface 306(or side surface 308) or with side surface 306(or side surface 308) align or be centrally located between side surface 306 and side surface 308.In other embodiments, each in residue section 342 and 344 can comprise two sections or multistage more, as long as the distance between the surface, the leftmost side of surface, the rightmost side of rightmost side section and leftmost side section is above-mentioned length L 3.
In addition, also be provided with the excision section on the lower wall 373 and 375 that limits notch 322 and notch 324, make lower wall 373 comprise residue section 333 and 343, lower wall 375 has the structure corresponding with lower wall 373.In the present embodiment, residue section 333 and 343 respectively from side surface 308 and side surface 306 towards another extension.Optional, the quantity, the length and location that remain section can be different.
When slip ball cover 300 is installed to crank 350,1) so that the residue section 342 of slip ball cover 300 and 344 modes of aliging with wider portion 317, along arrow D, the lower surface of slip ball cover 300 from crank 350 upwards is installed in T shape slit 355, until the residue section 333 and 343 of the lower wall 373 of the lower surface 354 pushing and pressing slip ball covers 300 of crank 350,2) along arrow P, slip ball cover 300 is slided in narrower part 316, and 3) mounting spring 360, as two springs 360 have been shown in Fig. 8 b.
Fig. 9 a has illustrated according to another view of the slip ball cover 300 of the application's the 3rd embodiment, Fig. 9 b shows its variation 300a, their difference is to slide and is formed with fillet between the lower wall 373 of notch 322 of ball cover 300a and inwall 376, has avoided stress to concentrate.As be known in the art, the slip ball cover can be the Plastic Parts by means of the mold injects moulding, and the structural advantage of slip ball cover 300 and 300a is to make simple, does not need mould slide block.
Fig. 9 c has illustrated according to another view of the slip ball cover 200 of the second embodiment of the application, Fig. 9 b shows its variation 200a, their difference be the to slide notch 222 of ball cover 200a has the cross-sectional plane of level and smooth curve shape, and for example semicircular in shape, avoided stress to concentrate.The slip ball cover 200 and the 200a that make schematic structure need the auxiliary of mould slide block to implement.
Below with reference to Figure 10 a and 10b, the 4th embodiment according to the application is described.
In this 4th embodiment, the same with the slit 55 of crank 50, the slit 455 of crank 450 longitudinally L extends, and has width W 10.Projection has projection 412 and 413 toward each other on relative two inwalls of the slit 455 of L longitudinally, and the distance between projection 412 and 413 is W20.Projection 412 and 413 does not extend the whole longitudinal length of respective inner walls, and on the contrary, projection 412 and 413 left-hand end surface and the distance that limits between the left side edge 445 of slit 455 are L10.On horizontal T, the distance between the upper surface 452 of projection 412 and 413 upper surface 412a and crank 450 is T10, and projection 412 and 413 thickness are T20.
The slip ball cover 400 of this 4th embodiment and slip ball cover 300 structures of the 3rd embodiment are roughly the same.Particularly, the thickness T 1 of the residue section 442 of upper wall and 444 on horizontal T approximates T10, and the distance between upper wall 472 and 474 approximates T20, and slip ball cover 400 is substantially equal to the gross thickness of crank 450 on horizontal T in the gross thickness on horizontal T.
when slip ball cover 400 is installed on crank 450, as shown in Figure 10 a, 1) make the upper wall 472 of slip ball cover 400 and slit 455 that 474 residue section 442 and 444 is aimed at cranks 450 part 416 outside the projection 412 and 413 on vertical L, slit 455 along the crank 450 of upwards packing into shown in arrow D, make the notch 422 and 424 of slip ball cover 400 aim at the projection 412 and 413 of crank 450 on vertical L, b) slip ball cover 400 is slid into the right-hand member of slit 455 to the right along arrow P, and c) assembling spring 460, equally, also show two springs 460 in the present embodiment.
Figure 11 a shows another view of slip ball cover 400, and Figure 11 b is its variation 400a, and is same, do not need mould slide block just can produce simply slip ball cover 400 and 400a.
Those skilled in the art it is contemplated that the second embodiment to the application makes a variation, with the projection feature application of slit in the 4th embodiment in the crank 250 of the second embodiment.Therefore accordingly, the size of slip ball cover 200 each several parts also changes, and as the slip ball cover 200b of Figure 11 c, Figure 11 d is the further variation 200c of slip ball cover 200b.Equally, make slip ball cover 200b and 200c and need the auxiliary of mould slide block.
Figure 12 shows the 5th embodiment according to the application, and the crank 550 in the present embodiment is identical with the crank 350 of the 3rd embodiment.Different from slip ball cover 300, except the notch that has corresponding to the notch 322 of slip ball cover 300 and 324, slip ball cover 500 also is formed with another notch (invisible in Figure 12) on side surface 506.When being assembled on crank 550, the notched joint on two opposite side surfaces of slip ball cover 500 is incorporated on the edge 535 and 545 that limits slit 555, and another notched joint of slip ball cover 500 is incorporated on the edge 525 of slit 555.
Figure 13 a shows the section-drawing that passes Fig. 8 b middle section III, shows slip ball cover 300 and crank 350; Figure 13 b is the cutaway view of the slip ball cover 300a of Fig. 9 a same cross-sectional when being installed on crank 350, and wherein, 300a is corresponding with the slip ball cover, and the lower wall of slit 355 and the junction of inwall are formed with fillet; Figure 13 c shows the section-drawing that passes Fig. 6 b middle section I or Fig. 7 b middle section II, shows slip ball cover 100 and crank 150 or slip ball cover 200 and crank 250; Figure 13 d is the cutaway view of the slip ball cover 200a of Fig. 9 d same cross-sectional when being installed on crank 150 or crank 250, and wherein, 200a is corresponding with the slip ball cover, and slit 155 or 255 lower wall and the junction of inwall are formed with fillet; Figure 13 e illustrates the section-drawing that passes Figure 10 b middle section IV, shows slip ball cover 400 and crank 450; Figure 13 f is the section-drawing of the slip ball cover 400a of Figure 11 b same cross-sectional when being installed on crank 450, and wherein, 400a is corresponding with the slip ball cover, and the lower wall of slit 455 and the junction of inwall are formed with fillet; Figure 13 g is the section-drawing of the slip ball cover 200b of Figure 11 c same cross-sectional IV when being installed on crank 450; Figure 13 h be the slip ball cover 200c of Figure 11 d same cross-sectional IV when being installed on crank 450 section-drawing wherein, 200c is corresponding with the slip ball cover, the lower wall of slit 555 and the junction of inwall are formed with fillet.
Figure 14 a and 14b show the mounting means according to the spring of the application's piston crank mechanism.
In the piston crank mechanism of Figure 14 a, adopted long spring 860, Comparatively speaking, the length of crank 850 is shorter.The output shaft of the driven unit of 870 expression wiper systems.In this case, can be with spring 860 with output shaft 870 at side direction A upper offset, thereby more compact structure.
Figure 14 b has illustrated to be provided with the situation of two springs 960.In the present embodiment, crank 950 is relatively wide, to hold two springs 960.
The two ends of the spring of piston crank mechanism can be fixed to crank and slip ball cover by the known any appropriate ways of those skilled in that art.For example crank and slip ball cover are formed with respectively the hole that holds the spring respective end, perhaps are respectively equipped with the ring that hooks together fixing spring.
Figure 15 has provided the part according to the piston crank mechanism of the application's the 6th embodiment.In the present embodiment, ball pin 630 is shaped as integral piece with slip ball cover 600.In addition, each feature of the application's previous embodiment also goes for the present embodiment.
The above has described the piston crank mechanism according to the application's wiper system, particularly, has described the preferred implementation of crank and sliding ball cover and the connection between them.In the wiper system according to the application; crank and connecting rod link together by elastic component and joint assembly; when be delivered to via connecting rod that sliding ball puts along the power of crank length direction during greater than the built-in spring power of spring; sliding ball cover and the connecting rod Compress Spring that is connected move towards an end that is connected with output shaft driven unit crank; make the effective length of crank shorten; thereby the pivot angle of the wiper arm of wiper system reduces, and effectively realizes the snow load defencive function.
Those skilled in the art should be appreciated that the application is not restricted to the embodiment that illustrates in top description and figure, but have contained all embodiment in the scope that drops on the application who is limited by following appended claims.
Claims (12)
1. a piston crank mechanism that is used for the wiper system, is characterized in that, described piston crank mechanism comprises:
Crank is used for being connected and exporting rotatablely moving of described output shaft with the output shaft of the driven unit of wiper system;
Connecting rod, for the wiper arm that connects the wiper system, and the driving wiper arm is done oscillating traverse motion; And
The joint assembly of connecting crank and connecting rod, described joint assembly comprises:
The ball pin that is connected with connecting rod; With
Sliding component, described ball pin is connected to described sliding component, described sliding component and described output shaft are connected to respectively two opposite ends of described crank, when be passed to via connecting rod and ball pin on sliding component along the power of crank length direction during greater than a certain critical value, described sliding component and coupled connecting rod slide with respect to crank along the length direction of crank together.
2. piston crank mechanism according to claim 1, is characterized in that, described crank is formed the slit that extends along the length direction of crank, and it is interior and removable with respect to described crank in described slit that described sliding component is installed to described slit.
3. piston crank mechanism according to claim 1 and 2, it is characterized in that, length direction along crank, be provided with elastic component between described crank and described sliding component, when be passed to via connecting rod and ball pin on sliding component along the power of crank length direction during greater than the intrinsic elastic force of described elastic component, described elastic component is compressed, thereby described sliding component and coupled connecting rod slide with respect to crank along the length direction of crank together.
4. piston crank mechanism according to claim 3, is characterized in that, described elastic component comprises one or more springs.
5. piston crank mechanism according to claim 1 and 2, it is characterized in that, described sliding component is formed the hole of extending along the central axial direction of ball pin, the ball head of described ball pin is fixed in described hole, wherein, the bearing of trend of the central axis of described ball pin is perpendicular to the length direction of described crank.
6. piston crank mechanism according to claim 1 and 2, is characterized in that, described sliding component is formed with described ball pin.
7. piston crank mechanism according to claim 2, it is characterized in that, the slit of described crank is opposite with the end that connects output shaft open-ended on the length direction of crank, by along the first and second edges of crank length direction and vertically connect the 3rd edge limited of described the first and second edges, and described piston crank mechanism also comprises for the stop part that described sliding component is closed in described slit.
8. piston crank mechanism according to claim 2, it is characterized in that, the slit of described crank is formed in described crank with being closed, and by along the first and second edges of crank length direction and vertically connect the third and fourth edge limited of described the first and second edges, wherein, the end that is connected with the output shaft of wiper system of the more close described crank in more described the 4th edge, described the 3rd edge.
9. according to claim 7 or 8 described piston crank mechanisms, it is characterized in that, described sliding component becomes I-shape, described sliding component is parallel to the first and second opposite side surfaces of crank length direction when comprising on being installed to crank, be formed respectively the first and second notches on described the first and second side surfaces, described the first and second notches are configured side and become to admit respectively described the first and second edges when sliding component is installed in the slit of described crank.
10. piston crank mechanism according to claim 9, it is characterized in that, described piston crank mechanism also comprises protrusion, described protrusion respectively from the inner peripheral surface at the first and second edges with the projection symmetrically in the described slit of vertical mode, described protrusion does not cover respective edges along the whole length of crank length direction and apart from inner peripheral surface first distance at described the 3rd edge, the thickness of described protrusion is less than the thickness of described crank, and is positioned in residence on thickness direction on the thickness of described crank.
11. piston crank mechanism according to claim 9 is characterized in that, described sliding component is parallel to the end surfaces of the central axial direction of described ball pin when comprising on being installed to crank, is formed with the 3rd notch on described end surfaces.
12. a wiper system is characterized in that, described wiper system comprises:
Driven unit, it provides power for the wiper system, and comprises the output shaft that output rotatablely moves;
Arbitrary described piston crank mechanism according to claim 1-11, the crank of described piston crank mechanism is connected with described output shaft; And
Wiper arm, it is connected with the connecting rod of described piston crank mechanism, and rotatablely moving of the output shaft of described driven unit is transformed into the oscillating traverse motion of the wiper arm of wiper arm assembly via piston crank mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220654861 CN202923606U (en) | 2012-12-03 | 2012-12-03 | Wiper system for vehicle and crank connecting rod mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220654861 CN202923606U (en) | 2012-12-03 | 2012-12-03 | Wiper system for vehicle and crank connecting rod mechanism thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202923606U true CN202923606U (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220654861 Expired - Lifetime CN202923606U (en) | 2012-12-03 | 2012-12-03 | Wiper system for vehicle and crank connecting rod mechanism thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202923606U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103847699A (en) * | 2012-12-03 | 2014-06-11 | 博世汽车部件(长沙)有限公司 | Windscreen wiper system used for vehicle and crank connecting rod mechanism of windscreen wiper system |
| CN104210464A (en) * | 2013-05-31 | 2014-12-17 | 比亚迪股份有限公司 | Windscreen wiper mechanism |
-
2012
- 2012-12-03 CN CN 201220654861 patent/CN202923606U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103847699A (en) * | 2012-12-03 | 2014-06-11 | 博世汽车部件(长沙)有限公司 | Windscreen wiper system used for vehicle and crank connecting rod mechanism of windscreen wiper system |
| CN103847699B (en) * | 2012-12-03 | 2016-12-21 | 博世汽车部件(长沙)有限公司 | Wiper system and toggle thereof for vehicle |
| CN104210464A (en) * | 2013-05-31 | 2014-12-17 | 比亚迪股份有限公司 | Windscreen wiper mechanism |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |